The running of the bulls in Pamplona, Spain, is an annual event people from all over the world go to see. Improv Everywhere staged their own running of the bulls in Venice Beach, California! No bulls were harmed in this stunt; the group used inflatable bull heads on people instead. Read more about this mission at the Improv Everywhere site.

To be honest, in Venice Beach, you might be entertained, but not totally surprised by such a parade. Look closely and you might recognize Guillermo Rodriguez from Jimmy Kinnel Live! and Joe Penna, also known as Mystery Guitarman. You might also see a shorter version of this on TV sometimes as an ad for Ford, as some of the agents escape in a Ford Fiesta. -via Viral Viral Videos

You'll have to ask them, but I can tell you for sure that my fingers automatically type "improve" when I post their stuff. Now that I have a robust spellchecker that corrects my text, I have to go back and correct it more than once!

Hilarious! One sticky point with me: I don't get why they're called Improv Everywhere. Their stunts are staged, not improvised. Or did they just misspell "Improve Everywhere", like, they make places better wherever they go....?